0.25-W power amplifier delivers the high native linearity

October 14, 2020 //By Jean-Pierre Joosting
0.25-W power amplifier delivers the high native linearity
InGaP HBT power amplifier from Guerrilla RF provides 24 dBm of output power for cellular applications requiring exceptional native linearity over temperature extremes.

Guerrilla RF has introduced the GRF5506, the second of ten new ¼ W linear power amplifiers being released over the next two quarters as part of the company’s expansion into the cellular market. These new InGaP HBT power amplifiers were designed specifically for 5G/4G wireless infrastructure applications requiring exceptional native linearity over temperature extremes of -40°C to 85°C.

Spanning a frequency range of 660 to 720 MHz, the GRF5506 variant is tuned to operate within the n12, n28, n71 and n83 5G new radio (NR) bands. The device can deliver over 24 dBm of linear power over the entire -40°C to 85°C temperature range while maintaining ACLR levels of better than -45 dBc, IMD3 levels <-23 dBm, EVM levels <1% and PAE Efficiencies >15% – all without the aid of supplemental linearization schemes like digital pre-distortion (DPD).

The ability to beat the -45 dBc ACLR performance metric without DPD is critical for cellular applications like home and commercial repeaters/boosters, femtocells, picocells and cable loss compensators associated with automotive ‘shark fin’ antennas. In each of these use cases, the sensitivity to cost, power and size constraints prohibits the use of elaborate linearization techniques like DPD. Instead, designers must rely on the power amplifier’s native linearity to meet the stringent emissions mask requirements imposed by the latest 5G and 4G standards.


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